The Austin Air Allergy Machine Jr provides the same HEGA filtration as the Allergy Machine - just on a smaller scale. The Allergy Machine Jr. HEGA air purifier is designed specifically for allergy and asthma sufferers with an extra edge in filtration capability. The Allergy Machine is the only room air purifier on the market that incorporates HEGA filtration (High Efficiency Gas Absorption) so that irritating contaminants are removed from the air before they can possibly trigger your allergies or asthma. 5-Year Warranty.